Thuraya XT 01, Руководство пользователя

Страница: 22 / 95

16
Getting started
01
02
03
04
HPA (High-Penetration Alerting)
The Thuraya system features a ‘High-Penetration Alerting’ capability that allows you to be notified of incoming calls even when your
Thuraya XT has poor signal coverage. When the Thuraya XT receives a High-Penetration Alerting signal it will alert you with an ‘early
ring’ and a special display message (see page 25).
To answer the call, you must immediately extend the antenna and move the Thuraya XT into a position that has a clear ‘line of sight’
to the satellite. When this has occurred the Thuraya XT display will change, prompting you to answer the call and proceed with the
conversation. If the call is not answered promptly after the High-Penetration Alerting signal is received, the calling party will be diverted
to voice mail and/or an announcement stating that you are not available to answer.
Similar to GSM, the satellite coverage area is divided into many different regions. The phone searches the network automatically (see
page 67) and determines which service region is active by registering its presence with the Thuraya system. If the Thuraya XT has not
been able to update this registration due to a weak signal, the registration information will become out of date or ‘stale’. This is indicated
on the display by a blinking SAT icon in the left of the signal strength indicator. This condition will clear automatically once signal
conditions improve and a call is made or a period of time elapses. You also have the option to speed up that procedure by manually
having the Thuraya XT register with the Thuraya system. This is accomplished with the function SAT Registration in the Thuraya XT’s
menu (see page 68). Make sure you have good SAT signal strength before using this function.